Akio Yoshikawa

Person

Kyoto, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optoelectronic device
- Patent number 7,064,898
- Issue date Jun 20, 2006
- Matsushita Electric Industrial Co., Ltd.
- Shoichi Takasuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Diffractive optical element that polarizes light and an optical pic...
- Patent number 6,947,213
- Issue date Sep 20, 2005
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser and a manufacturing method for the same
- Patent number 6,822,989
- Issue date Nov 23, 2004
- Matsushita Electric Industrial Co., Ltd.
- Toshiya Fukuhisa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical pickup with improved optical properties
- Patent number 6,735,024
- Issue date May 11, 2004
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical device with diffraction grating having plural grating regions
- Patent number 6,728,035
- Issue date Apr 27, 2004
- Matsushita Electric Industrial Co., Ltd.
- Shoichi Takasuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Diffractive optical element that polarizes light and an optical pic...
- Patent number 6,728,034
- Issue date Apr 27, 2004
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser and a manufacturing method for the same
- Patent number 6,631,148
- Issue date Oct 7, 2003
- Matsushita Electric Industrial Co., Ltd.
- Toshiya Fukuhisa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device
- Patent number 6,614,743
- Issue date Sep 2, 2003
- Matsushita Electric Industrial Co., Ltd.
- Naoki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Photodetector unit, and optical pickup, optical reproduction appara...
- Patent number 6,597,642
- Issue date Jul 22, 2003
- Matsushita Electric Industrial Co., Ltd.
- Shinichi Ijima
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor light-emitting unit, optical apparatus and optical di...
- Patent number 6,534,794
- Issue date Mar 18, 2003
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Lead frame which includes a die pad, a support lead, and inner leads
- Patent number 6,501,156
- Issue date Dec 31, 2002
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical device with diffraction grating having plural grating regions
- Patent number 6,501,601
- Issue date Dec 31, 2002
- Matsushita Electric Industrial Co., Ltd.
- Shoichi Takasuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for manufacturing an optical pickup
- Patent number 6,473,248
- Issue date Oct 29, 2002
- Matsushita Electronics Industrial Co. Ltd.
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser device
- Patent number 6,292,500
- Issue date Sep 18, 2001
- Matsushita Electric Industrial Co., Ltd.
- Yasuyuki Kouchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device
- Patent number 6,192,020
- Issue date Feb 20, 2001
- Matsushita Electronics Corporation
- Shouichi Takasuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser device
- Patent number 5,793,785
- Issue date Aug 11, 1998
- Matsushita Electronics Corporation
- Hideyuki Nakanishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device for use as a light source of an optical...
- Patent number 5,751,756
- Issue date May 12, 1998
- Matsushita Electronics Corporation
- Toru Takayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device and optical pickup head
- Patent number 5,748,658
- Issue date May 5, 1998
- Matsushita Electric Industrial Co., Ltd.
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head including a semiconductor laser having a non-scatter a...
- Patent number 5,729,519
- Issue date Mar 17, 1998
- Matsushita Electronics Corporation
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Lasing system with wavelength-conversion waveguide
- Patent number 5,617,435
- Issue date Apr 1, 1997
- Matsushita Electronics Corporation
- Hideo Nagai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device
- Patent number 5,539,767
- Issue date Jul 23, 1996
- Matsushia Electronics Corporation
- Hideyuki Nakanishi
- G02 - OPTICS
Information Patent Grant
Optical head including a semiconductor laser having a non-scatter i...
- Patent number 5,517,479
- Issue date May 14, 1996
- Matsushita Electronics Corporation
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Grant
Diffraction element and optical pick-up assembly
- Patent number 5,481,524
- Issue date Jan 2, 1996
- Matsushita Electronics Company
- Akira Ueno
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of etching semiconductor substrate
- Patent number 5,478,438
- Issue date Dec 26, 1995
- Matsushita Electronics Corporation
- Hideyuki Nakanishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device with integrated reflector on a (511) til...
- Patent number 5,479,426
- Issue date Dec 26, 1995
- Matsushita Electronics Corporation
- Hideyuki Nakanishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of producing stripe-structure semiconductor laser
- Patent number 4,948,753
- Issue date Aug 14, 1990
- Matsushita Electric Industrial Co., Ltd.
- Akio Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Buried stripe-structure semiconductor laser
- Patent number 4,719,633
- Issue date Jan 12, 1988
- Matsushita Electric Industrial Co., Ltd.
- Akio Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Diffractive optical element that polarizes light and an optical pic...
- Publication number 20040233534
- Publication date Nov 25, 2004
- Hideyuki Nakanishi
- G02 - OPTICS
Information Patent Application
Optical pickup with improved optical properties
- Publication number 20030112533
- Publication date Jun 19, 2003
- Hideyuki Nakanishi
- G11 - INFORMATION STORAGE
Information Patent Application
Optical device
- Publication number 20030053211
- Publication date Mar 20, 2003
- Matsushita Electric Industrial Co., Ltd.
- Shoichi Takasuka
- G02 - OPTICS
Information Patent Application
Optical device with diffraction grating having plural grating regions
- Publication number 20030016448
- Publication date Jan 23, 2003
- Matsushita Electric Industrial Co., Ltd.
- Shoichi Takasuka
- G02 - OPTICS

Akio Yoshikawa

Person

Patents Grantslast 30 patents

Optoelectronic device

Diffractive optical element that polarizes light and an optical pic...

Semiconductor laser and a manufacturing method for the same

Optical pickup with improved optical properties

Optical device with diffraction grating having plural grating regions

Diffractive optical element that polarizes light and an optical pic...

Semiconductor laser and a manufacturing method for the same

Semiconductor laser device

Photodetector unit, and optical pickup, optical reproduction appara...

Semiconductor light-emitting unit, optical apparatus and optical di...

Lead frame which includes a die pad, a support lead, and inner leads

Optical device with diffraction grating having plural grating regions

Method for manufacturing an optical pickup

Semiconductor laser device

Semiconductor laser device

Semiconductor laser device

Semiconductor laser device for use as a light source of an optical...

Semiconductor laser device and optical pickup head

Optical head including a semiconductor laser having a non-scatter a...

Lasing system with wavelength-conversion waveguide

Semiconductor laser device

Optical head including a semiconductor laser having a non-scatter i...

Diffraction element and optical pick-up assembly

Method of etching semiconductor substrate

Semiconductor laser device with integrated reflector on a (511) til...

Method of producing stripe-structure semiconductor laser

Buried stripe-structure semiconductor laser

Patents Applicationslast 30 patents

Diffractive optical element that polarizes light and an optical pic...

Optical pickup with improved optical properties

Optical device

Optical device with diffraction grating having plural grating regions